Mercury TV-220A restoration

[Electronic M]

Originally Posted by Kevin Kuehn

Tom, I'm sure you realize that with the Zenith color safety cap failures, it was because the high voltage would soar insainly high, at which point the HV could arc "through" the CRT neck glass to the yoke or convergence poles. But that's not the same thing that happens with sparks between adjacent dag islands or a grounding strap on the outside surface of a b&w CRT.

I have a set with bad safety caps and it appears to arc over the surface of the glass, and not through it.

The other example I gave of a poor arcing ground strap connection was a surface arc too and that surface arc DID cause an implosion.